結果

問題 No.951 【本日限定】1枚頼むともう1枚無料!
ユーザー uwiuwi
提出日時 2019-12-14 00:15:36
言語 Java21
(openjdk 21)
結果
AC  
実行時間 585 ms / 2,000 ms
コード長 4,198 bytes
コンパイル時間 7,912 ms
コンパイル使用メモリ 79,480 KB
実行使用メモリ 56,940 KB
最終ジャッジ日時 2023-09-10 07:40:05
合計ジャッジ時間 23,627 ms
ジャッジサーバーID
(参考情報)
judge13 / judge12
このコードへのチャレンジ
(要ログイン)

テストケース

テストケース表示
入力 結果 実行時間
実行使用メモリ
testcase_00 AC 44 ms
49,444 KB
testcase_01 AC 45 ms
49,852 KB
testcase_02 AC 46 ms
49,380 KB
testcase_03 AC 45 ms
49,388 KB
testcase_04 AC 44 ms
49,560 KB
testcase_05 AC 45 ms
49,444 KB
testcase_06 AC 45 ms
49,568 KB
testcase_07 AC 43 ms
47,428 KB
testcase_08 AC 44 ms
49,716 KB
testcase_09 AC 119 ms
55,728 KB
testcase_10 AC 106 ms
55,064 KB
testcase_11 AC 105 ms
54,864 KB
testcase_12 AC 207 ms
55,900 KB
testcase_13 AC 437 ms
54,668 KB
testcase_14 AC 166 ms
55,908 KB
testcase_15 AC 159 ms
56,004 KB
testcase_16 AC 194 ms
55,948 KB
testcase_17 AC 213 ms
56,412 KB
testcase_18 AC 44 ms
49,644 KB
testcase_19 AC 43 ms
49,436 KB
testcase_20 AC 44 ms
49,372 KB
testcase_21 AC 98 ms
54,580 KB
testcase_22 AC 79 ms
54,344 KB
testcase_23 AC 90 ms
54,752 KB
testcase_24 AC 568 ms
56,432 KB
testcase_25 AC 568 ms
56,408 KB
testcase_26 AC 567 ms
56,548 KB
testcase_27 AC 564 ms
56,580 KB
testcase_28 AC 585 ms
56,496 KB
testcase_29 AC 533 ms
56,736 KB
testcase_30 AC 44 ms
49,644 KB
testcase_31 AC 43 ms
49,468 KB
testcase_32 AC 85 ms
54,572 KB
testcase_33 AC 94 ms
55,172 KB
testcase_34 AC 123 ms
55,140 KB
testcase_35 AC 571 ms
56,204 KB
testcase_36 AC 572 ms
56,544 KB
testcase_37 AC 570 ms
56,708 KB
testcase_38 AC 567 ms
56,380 KB
testcase_39 AC 571 ms
56,684 KB
testcase_40 AC 567 ms
56,360 KB
testcase_41 AC 568 ms
56,472 KB
testcase_42 AC 565 ms
56,392 KB
testcase_43 AC 563 ms
56,436 KB
testcase_44 AC 563 ms
56,648 KB
testcase_45 AC 560 ms
56,416 KB
testcase_46 AC 529 ms
56,452 KB
testcase_47 AC 532 ms
56,716 KB
testcase_48 AC 530 ms
56,472 KB
testcase_49 AC 531 ms
56,380 KB
testcase_50 AC 531 ms
56,464 KB
testcase_51 AC 531 ms
56,940 KB
testcase_52 AC 422 ms
56,352 KB
testcase_53 AC 572 ms
56,364 KB
testcase_54 AC 506 ms
56,184 KB
権限があれば一括ダウンロードができます

ソースコード

diff #

package adv2019;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.Comparator;
import java.util.InputMismatchException;

public class D14 {
	InputStream is;
	PrintWriter out;
	String INPUT = "";
	
	void solve()
	{
		int n = ni(), K = ni();
		int[][] pd = new int[n][];
		for(int i = 0;i < n;i++){
			pd[i] = na(2);
		}
		
		Arrays.sort(pd, new Comparator<int[]>() {
			public int compare(int[] a, int[] b) {
				return -(a[0] - b[0]);
			}
		});
		
		// (i, j, k) = (iまでみたときj枚余裕があって、k円)
		// (j, k) -> (j+1, k+p[i]) + d[i]
		// (j, k) -> (j-1, k) + d[i]

		long[][] dp = new long[2][K+1];
		Arrays.fill(dp[0], -Long.MAX_VALUE / 3);
		Arrays.fill(dp[1], -Long.MAX_VALUE / 3);
		dp[0][0] = 0;
		for(int i = 0;i < n;i++){
			long[][] ndp = new long[2][K+1];
			Arrays.fill(ndp[0], -Long.MAX_VALUE / 3);
			Arrays.fill(ndp[1], -Long.MAX_VALUE / 3);
			for(int j = 0;j < 2;j++){
				for(int k = 0;k <= K;k++){
					ndp[j][k] = Math.max(ndp[j][k], dp[j][k]);
					if(j == 0 && k+pd[i][0] <= K){
						ndp[1][k+pd[i][0]] = Math.max(ndp[1][k+pd[i][0]], 
								dp[0][k] + pd[i][1]);
					}
					if(j == 1){
						ndp[0][k] = Math.max(ndp[0][k],
								dp[1][k] + pd[i][1]);
					}
				}
			}
			dp = ndp;
		}
		long max = 0;
		for(int i = 0;i <= K;i++){
			max = Math.max(max, dp[0][i]);
			max = Math.max(max, dp[1][i]);
		}
		out.println(max);
	}
	
	void run() throws Exception
	{
		is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes());
		out = new PrintWriter(System.out);
		
		long s = System.currentTimeMillis();
		solve();
		out.flush();
		if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
//		Thread t = new Thread(null, null, "~", Runtime.getRuntime().maxMemory()){
//			@Override
//			public void run() {
//				long s = System.currentTimeMillis();
//				solve();
//				out.flush();
//				if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms");
//			}
//		};
//		t.start();
//		t.join();
	}
	
	public static void main(String[] args) throws Exception { new D14().run(); }
	
	private byte[] inbuf = new byte[1024];
	public int lenbuf = 0, ptrbuf = 0;
	
	private int readByte()
	{
		if(lenbuf == -1)throw new InputMismatchException();
		if(ptrbuf >= lenbuf){
			ptrbuf = 0;
			try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); }
			if(lenbuf <= 0)return -1;
		}
		return inbuf[ptrbuf++];
	}
	
	private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); }
	private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; }
	
	private double nd() { return Double.parseDouble(ns()); }
	private char nc() { return (char)skip(); }
	
	private String ns()
	{
		int b = skip();
		StringBuilder sb = new StringBuilder();
		while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ')
			sb.appendCodePoint(b);
			b = readByte();
		}
		return sb.toString();
	}
	
	private char[] ns(int n)
	{
		char[] buf = new char[n];
		int b = skip(), p = 0;
		while(p < n && !(isSpaceChar(b))){
			buf[p++] = (char)b;
			b = readByte();
		}
		return n == p ? buf : Arrays.copyOf(buf, p);
	}
	
	private int[] na(int n)
	{
		int[] a = new int[n];
		for(int i = 0;i < n;i++)a[i] = ni();
		return a;
	}
	
	private long[] nal(int n)
	{
		long[] a = new long[n];
		for(int i = 0;i < n;i++)a[i] = nl();
		return a;
	}
	
	private char[][] nm(int n, int m) {
		char[][] map = new char[n][];
		for(int i = 0;i < n;i++)map[i] = ns(m);
		return map;
	}
	
	private int[][] nmi(int n, int m) {
		int[][] map = new int[n][];
		for(int i = 0;i < n;i++)map[i] = na(m);
		return map;
	}
	
	private int ni() { return (int)nl(); }
	
	private long nl()
	{
		long num = 0;
		int b;
		boolean minus = false;
		while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-'));
		if(b == '-'){
			minus = true;
			b = readByte();
		}
		
		while(true){
			if(b >= '0' && b <= '9'){
				num = num * 10 + (b - '0');
			}else{
				return minus ? -num : num;
			}
			b = readByte();
		}
	}
	
	private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); }
}
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